Pith Number

pith:QYW5GUWW

pith:2024:QYW5GUWWTVIFTPPHL7DRGZWOUF

not attested not anchored not stored refs pending

A low-memory Lanczos method with rational Krylov compression for matrix functions

Angelo A. Casulli, Igor Simunec

arxiv:2403.04390 v1 · 2024-03-07 · math.NA · cs.NA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QYW5GUWWTVIFTPPHL7DRGZWOUF}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

Lanczos with compression for symmetric matrix Lyapunov equations

Receipt and verification

First computed	2026-07-05T07:53:22.671461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

862dd352d69d5059bde75fc71366cea16d0681793578869a869c1815bd0fb272

Aliases

arxiv: 2403.04390 · arxiv_version: 2403.04390v1 · doi: 10.48550/arxiv.2403.04390 · pith_short_12: QYW5GUWWTVIF · pith_short_16: QYW5GUWWTVIFTPPH · pith_short_8: QYW5GUWW

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QYW5GUWWTVIFTPPHL7DRGZWOUF \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 862dd352d69d5059bde75fc71366cea16d0681793578869a869c1815bd0fb272

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98c8cc2099dff459cf067451a6d9b38ca874f5341b19f6495842a94c98676d50",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2024-03-07T10:33:29Z",
    "title_canon_sha256": "678eb8a694c0948c6e8aef568733d7ea6aa75b58fe8142f2b1c736a66ce1c90c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2403.04390",
    "kind": "arxiv",
    "version": 1
  }
}